deb http://apt.llvm.org/mantic/ llvm-toolchain-mantic-17 main
deb-src http://apt.llvm.org/mantic/ llvm-toolchain-mantic-17 main
deb http://apt.llvm.org/mantic/ llvm-toolchain-mantic-18 main
deb-src http://apt.llvm.org/mantic/ llvm-toolchain-mantic-18 main